Spring coiling machine embodying a change speed mechanism



Dec. 7, 1948.

Filed Dec. 26, 194e E. W. HALVORSEN SPRING COILING MACHINE EMBODYING ACHANGE SPEED MECHANISM 5 Stvxeets-Sheet 1 ELA/IER W #Awami/v DCC- 7,1948- E. w. HALvoRsr-:N 2,455,863 SPRING COILING' MACHINE EMBODYING' ACHANGE SPEED MECHANISM Filed Dec.. ze, 194e 5 sheets-sheet 2 Il-IIIIII lINVENTOR. f/ MER M/. HALVORsE/v ATTORNEY E. W. HALVORSEN SPRING COILINGMACHINE EMBODYING A CHANGE SPEED MECHANISM Dec. 7, 1948.

Filed Dec. 26, l1946 5 Sheejs-Sheet 3 NL J Y E m/ m WH w/N Wg Dn E MM aDec. 7, 1948. E. w. HALvoRSr-:N v 2,455,863

SPRING CQILING MACHINE EMBODYING A CHANGE SPEED MECHNISM Filed DSG. 26,1946 Sheets-Sheet 4 l fg?. 6

m Ms A /59 DeC- 7,.1948- E. w. HALvoRsEN 2,455,863

SPRING' COILING MACHINE EMBODYING I A CHANGE SPEED MECHANISM Filed Dec.26. 1946 5 Sheets-Sheet 5 in.. 'A

INVENTOR. 200 ELA/1ER W HAu/aRsf/v ATTRNEY Patented Dec. 7, 1948 SPRINGCOILING MACHINE EMBODYING A CHANGE SPEED MECHANISM Elmer W. Halvorsen,Worcester, Mass., assignor to The Torrington Manufacturlng'Company,Torrington, Conn., a corporation of- Connecticut Application December26, 1946, Serial No. 718,534

39 claim. 1

The invention relates to a spring coiling machine of the type adaptedfor intermittently feeding predetermined lengths of wire, the saidlengths of wire being coiled during feeding to form springs, and thewire being cut ofl' upon the completion of feeding and coiling. Whilenot necessarily so limited, the invention isparticularly applicable to aspring coiling machine such as that shown in Patent No. 2,119,002 lssuedMay 31, 1938 to Bergevin and Nigro.

The general object of the invention is to' provide improved means foroperating and controlling the shaft which actuates the feed rollers andthe cam shaft which times the cycle and actuates the cutoff mechanismand also certain other mechanisms of the machine.

Pursuant to the general object of the inven-- tion, a change speed orvariable speed mechanism is provided which is operated alternately attwo normally fixed but differing speeds and which, in conjunction withassociated gearing,

serves at one speed to rotate the shaft which drives the feed rollersand serves at its other speed to hold the said shaft stationary. "Therst said speed is adjustable in accordance with the length of thesprings to be wound.

Also pursuant to the general object of the inventlon, the change speedor variable speed mechanism, in conjunction with associated gearing,serves to rotate the cam shaft at two different speeds, the higher speedbeing utilized for operating the cutoff mechanism and the lower speedbeing utilized for timing the cycle and for operating the coilingmechanism. The higher speed of the cam shaft is constant and thereforethe cutoff mechanism is always operated rapidly and without loss oftime. The lower speed of the cam shaft is adjustable in accordance withthe length of the springs to be wound, the shaft being rotated slowlyfor long springs and faster for short springs.

In addition to the general object of the invention which has beenstated, there are various other more specic objects which will beapparent from the drawings and from the following specification andclaims.

In the drawings I have shown in detail a preferred embodiment of theinvention, but it will be understood that various changes may be madefrom the construction shown, and that the drawings are not to beconstrued as defining or limiting the scope of the invention, the claimsbeing relied upon for that purpose.

Of the drawings: I

Fig. 1 is a front view of the upper part of a machine embodying theinvention, certain parts being broken away ln order that other parts maymore clearly appear.

.and the parts for operating it, the lower part of this view being atransverse section taken along the line 3 3 of Fig. 6.

Fig. 4 is a view showing the diameter mechanism and the parts foroperating it, the lower part of this view being a transverse sectiontaken along the line 4--4 of Fig. 6.

Fig. 5 is a view showing the parts for operatlng the pitch mechanism,the lower part of this view being a transverse section taken along theline 5--5 of Fig. 6.

Fig. 6 is a longitudinal sectional view taken along the lines 6-6 ofFig. 1.

Fig. 'I is a diagrammatic view of the gearing, this view being takenalong the line 1-1 of Fig. 6 and being on a reduced scale.

Fig. 8 is a longitudinal sectional view taken along the lines 8-8 ofFigs. 1 and 10.

Fig. 9 ls a fragmentary plan view taken along the line 8-8 of Fig. 10.

Fig. 10 is a fragmentary transverse sectional View taken along the lineIII-I0 of Fig. 6.

General organization Referring to the drawings, particularly Figs. 1 and2, the main frame of the machine comprises a front plate I8 and a rearplate I2 which are suitably connected by tie rods at I4, I4. The mainframe is supported on a base I6, of which only -a fragment is shown inthe drawings. The space between the front and rear plates I8 and I2 isclosed by a cover I8 at the top and by suitable side plates, the sideplate at the left being designated 28 in Fig. 2. The side plates arepreferably hinged in order to provide access to the interior.

Extending longitudinally of the machine and mounted in suitable bearingssupported by the front plate I8 and the rear plate I2 isa main driveshaft 22. This shaft is driven by any suitable means, and its speed lisnormally constant for any one setting. However, its speed may beincreased or decreased when the set-up is changed to make differentsprings. As shown in Fig. 2, a belt pulley 24 is rotatably mounted onthe .shaft 22, this pulley being driven' by means of a belt 26 extendingover a pulley (not shown) which is located in the base of the machineand which is driven by a. suitable source of power such as an electricmotor. For changing the speed of the shaft 22, a variable speed motormay be provided or there may be a'suitable change speed mechanismassociated. with the motor. The pulley 24 may be operatively connectedwith the shaft 22 or disconnected therefrom by means. of a clutch 28which can be manually controlled by means of a longitudinally movablehand knob 29 located at the front of the machine.

Extending longitudinally of the machine and mounted in suitable bearingssupported by the front plate I8' and the rear plate I2 is anintermediate shaft 30. This shaft is driven, ordinarily intermittently,from' the drive shaft 22 by means of suitable mechanism to behereinafter described in detail. There is also provided a cam shaft 32which extends longitudinally of the machine and is mounted in suitablebearings in the front plate I and the rear plate I2. This shaft is alsodriven from the drive shaft 22 by means of suitable mechanism to behereinafter described. The timing of the various parts of the machine issuch that the cam shaft 32l ordinarily makes one complete rotation foreach spring to be coiled.

At the front of the machine are feed rollers 34 and 36 which are securedto longitudinal shafts 38 and 40 mounted in suitable bearings in thefront and rear plates I6 and I2. The shafts 38 and 40 are connected bymeshing gears 42 and 44. At the rear end of the intermediate shaft 3l)is a gear 46 which meshes with a gear 48 secured to the feed rollershaft 40. Thus the shaft 3D serves in conjunction with the said gearingas the means for driving the feed rollers.

The wire to be coiled is fed to the machine from the right and, in orderthat the rollers may firmly grip the wire, ,the front bearing for theupper shaft 38 is carried by a block 43 which is vertically movablewithin narrow limits. Downward pressure is applied to the block 49 bymeans of a bow spring 50 which may bev tensioned by a hand wheel 52threaded on a stud 54. Before reaching the rollers the wire passesthrough a pair of guides 56. The rollers 34 and 36 are rotated in thedirections indicated by arrows in Fig. 1 and when the wire is enteredbetween them they serve to move it horizontally, drawing it through theguides 56. A second pair of guides 58 is provided for the wire after ithas passed the feed rollers.

The rollers are provided with registering annular grooves of differentsizes for receiving wires of different sizes. It will be understood thatonly one set of grooves is used at any one time, the grooves to be usedbeing selected in accordance withthe diameter of the wire.

Adjacent the path of the wire at the left of the guide 58 is a toolholder 59 which is 'entered in a hole in the front plate I 0. As shownin Figs. l and 5, the tool holder carries an arbor 60 around which thewire is coued to form the desired spring, and the tool holder alsocarries a guide block 6I for maintaining the wire in position adjacentthe arbor. When a right hand spring is to be coiled the arbor is belowthe path of the wire, as shown, and the guide block is above the path ofthe wire. Adjacent the arbor 68 is a coiling point 62 which engages thewire to coil it downwardly around the arbor 68. The diameter of the coilis determined by adjusting the coiling point 62 toward or away from thearbor. Carried by the tool holder 59 and associated with the arbor 86 isa pitch tool 64 which engages the partly coiled wire below the initialpath thereof to defleet it longitudinally in such a manner as to pitch,as will presently be explained.

The drawings show the tool holder 59, together with the arbor 60 and theguide block 8| and the pitch tool 64, in the positions for colling righthand springs. The tool holder is reversible, end for end, for coilingleft hand springs, and it carries at its opposite end a separate arbor,a separate guide block anda separate pitch tool. When the tool holder isso reversed the said separate arbor and the said separate pitch tool arepositioned above the pathof the wire and the said separate guide blockis positioned below the path of the wire. When the tool holder isreversed for left hand springs, the coiling point 62 is correspondinglyadjusted, so as to coil the wire upwardly instead of downwardly aroundthe arbor.

By mechanism to be described, the coiling point 62 may be adjusted withrespect to the arbor to vary the diameter of the springs. By othermechanism to be described, the pitch tool 64 may be moved longitudinallyto vary the pitch of the springs. The diameter mechanism and the pitchmechanism will sometimes be hereinafter referred to singly orcollectively as coiling mechanism."

Also associated with the arbor 60 is a cutotl mechanism comprising twooscillatory tool carriers 66 and 68. These tool carriers are mounted andcontrolled, as hereinafter explained, to oscillate in oppositedirections, the left end of the lower carrier 68 moving upward from theposition shown in Fig. 1 and the left end of the upper tool carrier 6Bmoving downward. A cutoff tool 10 is mounted in one or the other of thecarriers 66 and 68. When a right hand spring is being made the tool 10is mounted in the lower carrier'68 and when the carrier is oscillated asdescribed the tool swings upward and inward so as to serve incooperation with the arbor 60 to cut off the wire when the spring iscomplete. When a, left hand spring is being made the tool 'I0 is mountedin the upper carrier 66 which moves downward and inward to cut off thewire in the manner described.

f Means for operating cutoff mechanism The mechanism for operating thecarriers for the cutoff tool is shown in Figs. 2, 3 and 6. Longitudinalrockshafts l2 and 14 are provided which are mounted in suitable bearingsin the front plate Ill and in the rear plate I2. The tool carriers B6and 68 are carried by these rockshafts at e front ends thereof.- Securedto the respective rockshafts are gear segnirlts` 16 and 18 which meshwith each other so as to cause the two shafts to rock uniformly and inopposite directions. Secured to the cam shaft 32 is a cam 80. A rocklever 82 is provided adjacent the cam 80, this Abeing pivoted on alongitudinal pivot rod 84 which extends between and is carried by thefront plate I0 and the rear plate I2. The rock lever 82 carries afollower roller 86 which engages the outer surface of the cam 80.

Secured to the shaft 12 is an arm 88. A link is provided,`the lower endof which is pivotally connected with the end of the rock lever 82 andthe upper portion of which extends through a hole in a pin SZcarried bythe arm 88. The upper portion of the link 98 is surrounded by a sleeve94, the lower end of which abuts against the pin 32 and the upper end ofwhich is engaged by a knob'96, accessible at the top of the machineabove the top cover I8. The knob 96 engages the threaded upper portionof the link 90 and may be secured in adjusted position by means of aassases rotation' for each spring and it will be seen that f during mostof the rotation the roller 88 and the parts directly associatedtherewith are'in their uppermost positions, the tool carriers 88and 88'being held in the positions shown in Fig. `l with the tool 18 out ofoperative position. The timing of'the machine is such that immediatelyupon the completion of the coiling of v-the spring` the roller 88 isengaged by the rise of the cam 88 so as to be pushed downward, thusmoving the link 88 downward and rocking the shafts '12 and 14, the uppershaft 12 being moved in the counterclockwise direction and the lowershaft 14 being moved in the clockwise direction. This enables the cutoi!tool to cut oil the wire in the manner already stated. The relationshipof the cutoff tool to the arborduring the cutoff operation Acan bevaried by turning the knob 88.l Adjustment of the knob serves to adjustthe effective `length of the link 88. the arm 88 being correspondinglyadjusted to turn the shafts 12 and 14 as maybe required.

which abuts against the pin |88, and the upper end of which is enilagedby a knob |42 accessible at the top of the machine above the top coveri8. The knob |42 engages the threaded upper portion of the link |84 andmay be secured in vadjusted position by means of a lock nut |44.

The shafts 12 and 14 ,are llongitudinally adjustso able within narrowlimits in order to .locate the cutting';tool 18 in position to properlyengage the wire. This is necessary, particularly in view of the factthat the wire may be enteredy in any one ofthe several grooves in therollers 84 and 88. A yoke |84 is providedA which has apertures forreceiving both of the shafts 12 and 14. Collars secured to the shaftsprevent relative longitudinal movement of the yoke. |88 is provided, therear endof whichv is threaded and engages a threaded aperture inthe'yoke |04. The frontend of the rod ||l8 is at the front of themachine and is squared or otherwiseshaped, as indicated at |08, toreceive a wrench. It will be seen that by means of the rod I|08 theshafts 12 and 14 may be moved outward or Ainward to properly position'-the tool 1'0. There is sufficient flexibility or play in the link 80 andthe parts associated therewith to permit the relatively smalllongitudinal adjustment.

Means for operating diameter mechanism coiling ,point is carried byv atransversely adjustable slide guided in the frontplate I0. A'

longitudinal rock'shaft i|2-. is provided and this shaft carries an arm||4, the upper endv of which is connected by means of a link ||8 withthe said slidewi I8. Carried by the cam shaft 321s a cam' ||8.Adjacentthe cam ||8 is a rock .lever |20 which is pivoted on the rod 84and which carries a follower roller |22 adapted to engage the outer faceof the cam. Pivotally mounted on a long itudinal pivot rod |24 is an arm|28. Adjustable along the arm |28 is an abutment |28, this beingadjustable by means of a screw |30and a knob |82. The upper end oftheabutment |28 engages the lowerface of the rock lever |20.

A link |84`isl provided, the ylower end of which is pivotally connectedwith the arm |28, and the upper portion of which extends through a holein a pin |88 carried by an arm |38 secured to the rockshaft ||2. Theupper portion of thelink |84 is surrounded by a sleeve |40, the lowerendA of A longitudinal rod,

A spring |48 'is .provided for biasing the shaft I l2 in thecounterciockwise direction, thus corre-k spondingly biasing the variousparts directly asso-- ciated with the shaft.

As shown in Fig. 4. ths'cam ||8 has a contour which is shaped inaccordance with the desired shape of the springs to be formed. Bychanging the form of the cam ||8 it ispossible to. produce springs ofvarying contour such as cone or tapered springs. barrel springs. ortwo-diameter springs. The cam ordinarily makes one complete rotationduring the formation of each spring and the timing is such that itserves, by means of the various parts described. to move the slide ||8and-the coiling point 82 transversely as the spring is being formed. Thecamv controls the pattern of movement of the slide and coiling point.but the positional relationship of the slide and coiling point withrespect to the cam can be varied by means of the knob |42 which servesto adjust the effective length of the link |84. Ihus the knob can beused to adjust the diameter of the spring without changing the shapethereof.`l As already stated. the shape of the cam ||8 determines thegeneraly shape of the spring.' This general shape may be'modihed withinreasonable limits by adjusting the abutment |28 along the arm |28 bymeans of the knob |82.

If springs of uniform diameter are to be coiled. the knob |42 is turnedto lower the roller |22 to such an extent that it is out of engagementwith the cam, I8. The coiling point 82 is not then controlled by thelcam II8, but it is controlled by an adjusting screwv |48 engaging theslide ||8 and having a knob |88.' By means of the knob and screw theslide lilcan be moved to bring the coiling point to the proper positionfor springs of anydesired diameter. In other instances. the coilingpoint 82 is adjusted by means of the screw |48 so that the cam ||8 iseffective during only Means for voperating pitch mechanism The mechanismfor operating and controlling the pitch tool 84 is shown in Figs. 2, 5'and 6. The pitch tool is carriedby a longitudinally-movable rod |82which is adjustably clamped toa block which is pivotally connected witha link |84. The link is pivoted to thelower end of one arm of abellcrank |88 which is pivotedat |88 to' a bracket |80 carried by thefront plate i0. Carried by the cam shaft 82 is a cam |82. Adjacent thecam is a rock lever |84 which is pivoted on the -rod 84 and whichcarries a follower roller |88 adapted to engage the outer face of thecam.

Pivotally mounted on the longitudinal pivot rod means of a screw |12 anda knob |14. The upper 'end of the abutment |10 engages the lower face ofthe rock lever |84. A link |18 is provided, the l horizontal arm ofthebell crank |88. The upper portion of the link |18 is surrounded byasleeve |80, the lower end of which abuts against the pin 7Illandtheupper end ofwhichisengsgedbya knob |99 accessibleatthetopofthsmachins above the top cover |9. The knob |92 engages the upper threadedportion of .the link |19 and maybe secured in adjusted position by meansof a lock nut |99. A spring |99 is provided for biasing the bell crank|99 in the clockwise direction. thus correspondingly biasing the variousparts directly associated therewith.

As shown in Fig. 5, the cam |92 has a contour which is shaped inaccordance with the-desired variations in the pitch of the springs to beformed. ,By changing the form of the cam |92 it is possible to producesprings having different pitches at different portions thereof. The camy makes one complete rotation during the formation of each spring and.the timing is such that the rod |92 and the pitch tool 99 are movedlongitudinally to change the pitch as the spring is being formed. Thecam controls the pattern of` the movement of the rod and pitch tool. butthis general pattern may be modified within reasonable limits byadjusting the abutment |19 along the arm |99 by means of the knob |19.

If springs of uniform pitch are tolbe coiled. the knob |92 is turned tolower the roller |99 to such an extent that it isout of engagement withthe cam |92. For adjusting the position of the pitch tool when it is notcontrolled by the cam, there are two set screws |99, |99 carried by thebracket |99. These set screws directly engage the bell crank |99 and byturning the screws assess the hell crank can be moved in one directionor the other to bring the -pitch tool into theposition necessary for thedesired pitch.

. 'I'he machine as thus far described is similar to that lshown in theaforesaid Patent No;` 2,119,002.

companion iixed pulley |99 and to thereby vary' the' effective diameterof the two Pulleys, thatis, to vary the position at which they areengaged by the belt |99. The other movable pulley |92 is spring-pressedtoward the companion nxed pulley and the position of this pulley isautomat.- icaliy adjusted by means of the belt in accordance with theadjustment of the other movable pulley |99. As shown, the means forcontrolling the pulley |92 comprises a spring 299 which is con- 'nectedwith a pivoted lever 2|9 as shown in lig,

2. The upper end of the lever 2|9 ensues the outer face of a ballbearing 2|| which is adjacent the pulley |92.- When the pulleyl99 ismoved longitudinally by mechanism to bs presently described in detail,the effective diameter of the pulleys |99 and^|99 can be decreased orincreased and the eective diameter of the pulleys |99 and |92 iscorrespondingly increased ordecreased through the action of the belt.Thus the speed of the pulleys |99 and i99and of the sleeve |99 can bevaried with respect to that of the shaft 22.

Preferably the bearings for the front ends of the shafts -22 and 99 aremounted ina plate 2|2 which is in un opening in the front plate I9 andwhich is detachably bolted in place. When the belt |98 is to be put inplace or removed, the platev 2 I 2 is removed, thus enabling the belt tobe passed over the ends of the two shafts and through the opening in theplate I9. c

Connected with the rotatable sleeve or member |99 is gearing whichnormally serves upon rotation of the member at one speed to rotate theintermediate shaft 99 and the feed rollers in the directions toeifectfeeding and which serves and the described mechanisms do not ofthemselves constitute any part of the present invention.

Means for rotating and controllingintermediate shaft and cam shaft Ithas already been stated that the intermediate shaft 99 is driven fromthe main drive shaft 22. It is so driven by means of a rotatable memberwhich is rotated at different speeds bymeans of a change speed orvariable speed drive mechanism actuated by the main drive shaft. Whilethe invention is not necessarily so limited. the roftatable member ispreferably a sleeve |99 rotatupon rotation ofthe member at another speedto maintain the said intermediate shaft and the feed rollers stationary.The gearing preferably also normally serves upon rotation of the member|99 at the -tlrst said -speed to rotate the cam shaft 92 at a relativelylow speed and serves upon rotation of the said member at the secondspeed to rotate the said cam shaft at a higher speed. In ,order that thesleeve or member may engage the said v gearing, it is provided with asun gear 2|9 carried thereby or formed integrally therewith.

The gearing for rotating the intermediate shaft 90 includes aplanetpinioncarrier gear 2|9 which bracket m and by a uni; zu pivoted to vthel 'bracket at 296. 'I'he link 299 can-be swung about its axis toproperly tension the belt and then the link can be clamped in adjustedposition.

One of the cone .pulleys of each pair islongitudinally adjustablealong'its supporting element and the other pulley of each pair isrigidly secured 'to its supporting element. As shown, the lower pulley|92 at the left is longitudinally movable and the upper pulleyl |99 atthe right is longitudinally movable. Means is provided forlongitudinally moving one of the pulleys, as for instance the pulley|99, to adjust its relationship to the is preferably rotatableconcentrically with respect to the shaft 99 and which meshes with-a gearIll xed on the .drive shaft 22. Inasmuch as the shaft 22 rotates atconstant speed, the` gear 2I9 also rotates at constant speed.- Securedto the shaft 30 for rotation therewith is a sun gear 299 and as shown,this gear 2|9 hasv a long hub on which the gear 2|9 rotates. -Thesungear 2|9 is immediately adjacent the sun gear 2li. 8ecured to thegear 2|9 are two bearing studs 229. 2201on which are mounted planetpinions 222, 222 and 229, 229. The planet pinions of each pair arerotatable in unison, one of them being mounted on the hub of the other.The planet pinions 222, 222 mesh 'with the before-mentioned sun gear 2|3which is formed on the sleeve"l99 -and is rotatable with the pulleys |99and |99.

The planet pinions 229, 229 mesh with the sun gear 2I9 which isrotatable with the shaft 99.

Referring particularly to Fig. '1, it will be seen that the. gears 92and 99 rotate respectlvely'in the clockwise and eounterclockwisedirections, as

indicated, when the feed rollers are in operation.

The shaft 99 isV connected withthegear 99 :by means'of the gears 99 and99,4 which arebmltt'ed from Fig. 'I for greater clarity. shaft 99rotates in the clockwise direction,"'as does also 9' the'sun gear 2 I8securedftothe shaft. The shaft 22 and the gear 2|6 carried thereby arerotated vin the counterclockwise direction and therefore the sun gear2|4 is rotated in the clockwisev direction. The sun gear 2|3 which isdriven by the variable speed pulleys |94 and |96 rotates in the samedirection as the shaft 22,*'th`at is, in the counterclockwise direction,but the speed of rotation is variable.

1 In-order that the operation may be more clearly understood, let it beassumed that the sun gear 2 I 3 is stationary (although it never isstationary). With the sun gear 2| 3 .stationary and with the planetpinion carrier gear 2|4 rotating in the clockwise-direction, the planetpinions 222, 222 which mesh with the sun gear 2I3 will rol-l on the saidsun gear and will be relatively rotated in the clockwise direction. Theplanet pinions 222, 222 are rigidly connected with the planet pinions224, 224 and these latter pinions mesh with the, sun gear 2|6. On'vaccount of the smaller diameters of the pinions 224, 224 the net resultis that the sun gear v2|8 is rotated in the same direction as the planetpinion carrier gear, that is', in the clockwise direction, butat a lowerspeed.` Actu-- ally, the sun gear 2|3 is not stationary as has ybeenassumed, but it rotates in the counterclockwise direction. In sorotating it increases the speeds of clockwise rotation of the planetpinions 222,222 and 224, 224 thus reducing the speed of rotation of thesun gear 2I6 in the clockwise direction. The ratios of the severalpinions andl gear are such that, when the speed of rotation of the sungear 2|3 is increased :to a predetermined maximum, the sun gear 2|8 isheld` stationary. Thus the sun gear 2|8 andthe shaftV 30 are stationarywhen the pulleys |94 and |96 and the sleeve |89 are at maximum speed,and the said pinion and shaft are rotated in the clockwise direction atprogressively increasing vspeeds as the speed of the pulleys and sleeveis decreased. The gearing for rotating the cam shaft 32 includes aplanet pinion carrier gear 226fwhich is rotatable concentrically withrespect to the cam shaft and which meshes with a gear 228 onrthe driveshaft 22. Inasmuch as the gear 228 is rotated in the counterclockwisedirection, the sun u rection inasmuch as 10 it meshes with the gear 228on the` shaft 22 which is rotated in the counterclockwise direction. Thegear 232 and the sun gear 236 are rotated, if at all, in thecounterclockwise direction inasmuch as the gear 232 meshes with the gear234 which is rotated in the clockwise direction when it is rotated atall. It has already been stated that when the pulleys |94 and |96 andthe sleeve |'89 are at their maximum speed the pinion 2 I8 and all partsdirectly connected therewith, including the shaft v3|), are stationary.When this i condition prevails, the gear 232 and the sun gear 236 arealso stationary. inasmuch as the gear 226 is rotating inthe clockwisedirection, the planet pinions 240, 240 roll around the stationary sungear 236 and are rotated in the clockwise direction. On account of thesmaller diameter of the planet pinions 242, 242 the sun gear 230 whichmesheswith the pinionsv 242, 242 is rotated in the clockwise directionbut at a lower speed. The sun gear` 236 is rigidly connected with theshaft 32 and therefore the shaft is rotated in the clockwise direction.

When the sun gear 233, instead of being held stationary, is rotated inthe counterclockwise direction -by reason oi the rotation of the shaft38 and the gear 234, the speed of rotation of the planet pinions 240.240 and 242. 242 in the clock wise direction is increased. The speed ofvsuch rotation is dependent upon the speed of rotation of the shaft 30and gear 234. This increase in speed of the planet pinions decreases thespeed of rotation of the sun gear 236. The ratios of the several pinionsand gears are such that said sun gear 230 and the shaft 32 are heldstationary when the shaft 30 is at its maximum speed.

Means is provided for automatically adjusting the change speed orvariable speed mechanism vso that the rotatable member or sleeve isrotated so limited, the "rst" speed is preferably the gear 22 6 isrotatedv in the clockwise direction.

Secured to the shaft 3 2 for rotation therewith is a sun gear 230 and asshown this gear 236 has a long hub on which the gear 226v rotates.yRotatably mounted on the shaft 32 is a gear 232 which meshes with a gear234 rigidly secured to the intermediate shaft 30. The said gears are notshown in mesh in Fig. 6, but they are so shown in Fig. 8. The gear`234|, while. mounted on and f securedto the intermediate sha1 i; ,.'i,is rotated indirectlyby the rotatable s leeve` |89 and bythe variablespeedv mechanism, this'being effected by Vthe described gearingassociated with the shaft 36.l Rotatable with thefgar 2321s a sungear236,

the'said gear 'having along hub to which the vgear ad'jacentvtluefisungear 230.5, Secured tothe-'gear'.226'are two'bearing studs233,233 on which lare mountedxpl'anet pinions lower speed and the secondspeed is preferably the higher speed. In describing the said meansreference will be had particularly to Figs. 8, 9 and lo.

The operating and controlling' means comprises a lever pivoted at oneend and having a roller at the other end which engages a cam on thecamshaft. Between its ends the lever is connected with the bodilymovable cone pulley |94 to move it longitudinally. Connected with thesaid pulley '94 is a ball bearing 244, the outer race of which is inengagement with a ring 246 having trunnions 243, 248. Embracing thering246 is a yoke 256 vconstituting a part of thesaid 232 is' secured.- 'I'hefsun gear 236 islimmediately 2148, 248. Connected with the yoke 250and completing the lever are oppositely extending arms 252 and 254. Thearm 252 extends intoa slot in a rod 253 where it i`s pivoted at 258.-The other arm 254 carriesv a roller 260 which is positioned to engagethe rearward face of a cam 262 secured to the cam shaft 32. The cam 262has a 246, 248 and 2M.` 242. The planetpinions ofve'ach `pair arerotatable in unison, 'one of them. being Vmounted onthe hub of .theother; The planetr pinions`240, 240 mesh withw-thefsun'jgear. 236

which is rotatable with-the gear'` 232. The planet .pinions 242, 242mesh withf .thefsun gear which is rotatable with 'the .shaft-32.'

I Referring particularly to Fig. '7, itwill be seen l that the gear 226is rotated in the clockwise diilat rear face withwhich the roller260engages during. the major portion'A of the rotation of the cam.Thecam 262 is provided with a recess 264 ,A into which the roller 26|)moves when the recess .is opposite the roller. the said recess havinginclined sides. -When the cam is rotated, .the roller is vrepetitivelyand alternately engaged by the dat face 'of the cam and is permitted toenter vthe recess'.r Thus the pulley |94 is reciprocated accuses Theextent of movement of the pulley |54 to? ward the pulley |55 ispreferably adjustable in order to regulate the lower speed of thepulleys and of the sleeve |55, this lower speed corresponding to. thespeed of the shaft 55 during feeding and coiling. For 256 islongitudinally adjustable to move the pivot 255. The right end of therod is threaded and it extends through a-threaded bushing 255 rotatablein an opening in the front plate I5. The bushing 255 carries a knob 255by means of which it may be turned. The bushing may be locked inadjusted position by means of a lock nut 215. lt will be seen that therod 255 is moved endwise when the knob 255 is turned. An adjustable stop212 on the rod 255 limits movement thereof toward the left.

As has'already been stated, the cam shaft 52 is stationary when theshaft 55 is at a predetermined maximum speed and when the pulleys |54and |95 and the sleeve |55 are at a predetermined minimum or firstspeed. The predetermined minimum speed of the pulleys and sleeve isattained by adjusting the rod 255 toward the left to the extentpermitted by the stop 212. With the rod in this position and with 'theroller 255 engaged with the flat rear face of the cam 252, the speed ofthe pulleys and the resulting speed this purpose, the rod of the shaft55 is such as to maintain the shaft 32 stationary. If the shaft 52 isnot held exactly stationary, the stop 212 can be adjusted to such extentas may be necessary.

has already been stated, the shaft 55.is

stationary when the pulleys |54and |55 .and the y sleeve-|59 are at apredetermined maximumor f second speed. When the shaftf 55 is stationarythe cam shaft 52rotates at its maximum speed. To attain maximum pulleyspeed' the pulley |54 must move toward the. right, and this pccurs whenthe roller 255 enters the recess 254 in the cam 252. The extent ofmovement of-the pulley toward the right must be accuratelylimited inorder to attain the exact maximum speed that is necessary in order forthe shaft 55 to be held stationary. In order to limit such movement ofthe pulley an adjustablestop is provided. As shown, this stop is in theform of a rod 214 carried by the front plate I5 and positioned at itsinner end to engage the ring 245. The rod'may conveniently extendthrough the bearing plate 2l2,

in which it is threaded. I he outer end of the rod is engageable by awrench, and the rod can L be adjusted to limit the movement of thepulley |54 so as't'o attain the exact maximum pulley speed necessary tohold the shaft stationary" when the roller 2-55 is in thecam recess254'.

When the ring 245 is in engagement with thestopv rod 214 the roller isin the cam recess'254,

but not vat the bottom thereof.

Operation When the machine is to be used for ceiling springs ofdei'inite lengths the pivot 2,55 isad- 1 justedvby means of the knob 255to a position toward the right from that shown in Fig. 8,-thus shaftmaking yone complete rotation for each' spring to be coiled. ADuring theceiling operation the roller 255 remains engaged with the'flat rear faceof the cam 252. As the cam shaft rotates, v

the cams ||5 and |52 and the associated mechanisrns that have alreadybeen described serve to operate the diameter mechanism and the pitchmechanism to control the diameter and pitch of and as already stated.the shaft 55,1s then stationary and wire feeding is stopped. `When theshaft 55 is stationary the cam shaft 32 rotates at its maximum speed andthe timing is such that the cam 55 and the parts associated therewithoperate the cutoff mechanism while' the shaft 52 is operating at maximumspeed. As soon as the cutoff operation is completed the roller 255 n.

is forced out of the recess 254, and thereupon the several parts arerestored to their former positions so as to resume feeding and effectthe coiling of another spring.

It will be observed that ,during each cycle the speed of the pulleys |54and |55 and of the sleeve |55 is alternately changed from a lower speedspeed. vinasmuch as this is done by the shifting of the cone pulleysandby the adjustment of the belt, the changes are effected gradually andthus the feeding is stopped and started gradually without any suddenshock. v The cam shaft rotates at vless than its maximum speed duringcoilingbut operates at its maximum speed during cutoff, thus eecting aconsiderable saving inv time. This is in contrast,y with prior machineswherein the cam shaft is operated at a .continuous z speed. For a longspring the .caml shaft was necessarily rotated vvery vslowly and theresult was that much time was wasted in the very slow operation of theAcutoff mechanism. With the present construction the' cutoif mechanismoperates vat vmaximum speed under al1 conditions regardless of thelength of the spring. l 1

The shape and patternof .the spring are controlled, as alreadydescribed,by the v diameter mechanisngand by the pitch mechanism andthe'length :of the spring. can be varied by changing #the vpusition'of'thepivot 255 to adjust the nrstf 'speed ofthe rotatablemember or sleeve|55. For

.a shorter spring the pivot-is moved `toward the rightV ldjffor'a longerspring the pivot is moved toward the left. It will beseen that the.speed ofl thewire feed varies with the length ofthe spring. 'beinghigher for long springs and lower for shortfsprings.y l

The "ilrstf or lower speed of the pulleys-|54 and |55 isadjustable' asdescribed. but the secseparating the pulley |54 from the pulley |55 andcausing the pulleys and the sleeve |55 to l rotate at a speed higherthan the minimumspeed.

Thus the intermediate shaft v5,5 and the'feed rollers are operated at aspeed less than y tlieir maximum speed. By means of the gearing that Ihas been described, the cam shaft 52 -is rotated at alspeed less thanits maximum speed,tliily 5 on "orf-higher speed is `always the same,after thenecessary adjustment of the stop rod v214 vhas been made. Asthe said first speed is adjusted the speed ofthe intermediate shaft 55varies inversely th'erewith,;'and the lower speed of the cam-sha'ftji-fvaries directly therewith.4 For longer springs. theuspe'ed ofthe intermediateshaft and the speed-offfeedlng and ceiling are increasedand y the am@y gfthecam shaft is decreased, and for v shorter.:springsvthe speed of the intermediate shaft th'egsp'eed of feeding andyc'oilinga're the speed of the cam shaft is in'- to a maximum speed andthen back tothe lower w For coiling a continuous spring the pivot 258 isadjusted to its extreme left position as determined by the stop 212.With the pivot in this position the shaft 30 operates at maximum speedand the cam shaft 32 is stationary. inasmuch as the cam shaft 32 isstationary the cutoff mechanism does not operate. For a continuousspring the diameter mechanism may be adjusted so that the cam ||8 `isinoperative, the diameter being determined by the screw |48 andthe knob|50. The pitch mechanism may be adjusted so that the cam |62 isinoperative, the pitch being controlled by the set screws |88, |88. f

It will be observed that the power for rotating the shafts 3|!l and 32is transmitted in part through the gearing connecting the shaft 22 withthe shafts 30 and 32 and in part through the variable speed mechanismconnecting the shaft 22 with the shaft 30. In fact, only a small portionof the power is transmitted through the variable speed mechanism, thismechanism serving chiefly to control the said gearlng'which constitutesthe principal power transmitting means. Therefore, the variable speedmechanism can be of relatively small capacity and it can be readilyoperated to change the speed.

The invention claimed is:

1. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil the Wire after it has passedthe rollers, cutoff mechanism positioned to cut the wire after it hasbeen coiled, a constant speed drive shaft, an intermediate shaft gearedto the feed rollers, a change speed mechanism connected with the driveshaft, a rotatable member driven by the change speed mechanism, arotatable cam shaft, means operable repetitively by the cam shaft duringrotation thereof for adjusting the change speed mechanism to rotate therotatable member alternately at two different normally fixed speeds,gearing connected with the rotatable member and serving upon rotation ofthe member at one said speed to rotate the intermediate shaft in thedirection to rotate the feed rollers so as to effect feeding andcoiling, the said gearing serving upon rotation of the member at theother said speed to maintain the intermediate shaft and the feed rollersstationary so as to discontinue feeding and coiling, and a meansactuated by the cam shaft for operating the cutoff mechanism when theintermediate shaft and the feed rollers are stationary.

2. The combination in a spring coiling machine as set forth in claim l,wherein the intermediate shaft is rotated upon rotation of the rotatablemember at its lower speed and is maintained stationary upon rotation ofthe rotatable member at its higher speed. Y

3. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil thewire after it has passedthe rollers, cuto mechanism positioned to cutthe wire after t has beencoiled, a constant speed drive shaft, an intermediate shaft geared tothe feed rollers, a variable speed drive mechanism connected with thedrive shaft, a rotatable mem- 14 normally fixed speeds while the other'of the said speeds remains unchanged, gearing connected with therotatable member and serving upon rotation of the member at the saidmanually adjusted speed to rotate the intermediate shaft at a speeddependent on that of the rotatable member and in the direction to rotatethe feed rollers so as to eect feeding and coiling, the said gearingserving upon rotation of the member at the other said speed to maintainthe intermediate shaft and the feed rollers stationary so as todiscontinue feeding and coiling, and means actuated by the cam shaft foroperating the cutoff mechanism when the intermediate shaft and the feedrollers are stationary. n

4. The combination in a spring "coiling machine as set forth in claim 3,wherein the gearing serves to rotate the intermediate shaft at speedsvarying inversely with the manually adjusted speed of the rotatablemember.

5. The combination in a spring coiling machine as set forth in claim 3,wherein the manually controlled means serves to change the lower of thetwo different normally fixed speeds of the rotatable member, wherein thegearing connected with the rotatable member serves to rotate theintermediate shaft and the feed rollers at speeds which vary inverselywith the adjustment of the said lower speed of the rotatable member, andwherein the said gearing serves upon rotation of the rotatable member atits higher `speed to maintain the intermediate shaft and the feedrollers stationary.

6. In a spring coiling machine, the combination of wire feed rollers,spring coiling'mechanism positioned to coil the wire` after .it haspassed the rollers, cutoff mechanism positioned to cut the wire after ithas -been coiled, a constant speeddrive shaft, an intermediate shaftgeared t0 the feed rollers, a sleeve rotatable on the intermediateshaft, a change speed drive mechanism connecting the said drive shaftwith" the said sleeve, a rotatable cam shaft, means repetitivelyoperable by the cam shaft during rotation thereof for adjusting thechange speed mechanism to rotate the sleeve alternately at two differentnormally lxed speeds, gearing connected with the sleeve and serving uponrotation ofthe sleeve at one said speed to rotate the intermediate shaftin the direction to rotate the feed rollers so as to effect feeding andcoiling, the said gearing Yserving upon rotation of the sleeve at theother ysaid speed to maintain the intermediate shaft yand the feedrollers stationary so as to discontinue feeding and coiling, and ameansactu- Aated by the cam shaft for operating the cutoffl mechanism whenthe intermediate shaft and the ber driven by the variable speedmechanism, a f

justing the variable speed mechanism to rotate the rotatable memberalternately at two different normally fixed speeds, manually controlledmeans for adjusting the variable speed drive lmechanism to change one ofthe said alternate feedA rollers are stationary.

' l 7. The combination in a spring coiling machine as set `forth inclaim 6, wherein the intermediate shaft is rotated upon rotation of the.rotatable sleeve at its lower speed and is maintained stationary uponrotation of therotatable sleeve at its higher speed.

8. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has passedthe rollers, cutoff mechanism positioned to cut the wire after it hasbeen coiled, a constant speed .drive shaft, an intermediate shaft gearedto the feed rollers, a sleeve rotatable on the intermediate shaft, aVvariable speed drive mechanism connecting the said drive shaft with thesaid sleeve, a rotatable cam shaft, means repetitively operable 15 bythe cam lshaft during rotation thereof for ad- Justing ,the variable,speed mechanism to rotate the sleeve alternately at two differentnormally fixed speeds. manually controlled means for acljusting thevariable speed drive mechanism to change one of the said alternatenormally fixed speeds while the other of the said speeds remainsunchanged, gearing connected with the rotatable sleeve and serving uponrotation of the sleeve at the said manually adjusted speed to rotate theintermediate shaft at a speed dependent on that of the rotatable sleeve'and in the direction to rotate the feed rollers so as to eect feedingand coiling, the said gearing serving upon rotation of the sleeve at theother said speed to maintain the intermediate shaft and the feed rollersstationary so as to discontinue feeding and coiling, and a meansactuated by the cam shaft for operating the cutoff mechanism when theintermediate shaft and the feed rollers are stationary.

9. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has passedthe rollers, cutoff mechanism positioned to cut the wire after it hasbeen coiled, a constant speed drive shaft, an intermediate shaft gearedto the feed rollers, a sleeve rotatable on the intermediate shaft, avariable speed drive mechanism connecting the said drive shaft with thesaid sleeve and comprising a pair of cone pulleys on the drive shaft oneof which is bodily movable toward and from the other and 'a pair of conepulleys on the sleeve one of which is bodily movable toward and from theother and also comprising an endless belt passing over and engaging `thepulleys, a rotatable cam shaft, means repetitively operable by the camshaft during rotation thereof for changing the position of at least oneof the bodily movable pulleys to rotate the sleeve alternately at twodiiferent normally fixed speeds, gearing connected with the sleeve andserving upon rotation of the sleeve at one said speed to rotate theintermediate shaft in the direction to rotate the feed rollers so as toeffect feeding and coiling, the said gearing serving upon rotation ofthe sleeve at the other speed to maintain the intermediate shaft and thefeed rollers stationary so as to discontinue feeding and coiling, and ameans actuated by the cam shaft for operating the cutoff mechanism whenthe intermediate shaft and the feed rollers are stationary.

10. The combination in a spring coiling machine as set forth in claim 9,wherein there is an adjustable stop for limiting the movement of atleast one of the bodily movable pulleys in one direction so as to rotatethe sleeve at the exact speed that is necessary to maintain the inter-`mediate shaft and feed rollers stationary.

1l. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil the wire after it haspassedthe rollers, cutoff mechanism positioned to cut the wire after ithas been coiled, a vconstant speed drive shaft, an intermediate shaftgeared to the feed rollers, a sleeve rotatable on the intermediateshaft, a -changespeed drive mechanism connecting the said drive shaftwith the said sleeve, a rotatable cam shaft, means repetitively operableby the cam shaft during rotation thereof for adjusting the change speedmechanism to rotate the sleeve alternately at two different nory mallyfixed speeds, a sun 4gear on the rotatable sleeve, a planet pinioncarrier gear rotatable on the intermediate shaft, a gear on the driveshaft meshing with the said carrier gear to rotate it at accesos firstsaid sun gear, pairs of connected planet pinions of different diameterscarried by said carrier gear, the planet pinions of each pair meshingrespectively with the said sun gears and the ratios of the several gearsand pinions being such that the intermediate shaft and feed rollers arerotated to effect feeding andcoiling when the sleeve is rotated atone\said speed and are maintained stationary to discontinue feeding andcoiling when the sleeve is rotated at the other said speed, and a meansactuated by the cam shaft for operating the cuton mechanism when theintermediate shaft and the feed rollers are stationary.

12. The combination in a spring coiling machine `are set forth in claim11, wherein the intermediate shaft is rotated upon rotation of thesleeve at its lower speed andl is maintained stationary upon rotation ofthe sleeve at its higher speed. f

13. In a spring coiling machine, the combination of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has passedthe rollers, cutoff mechanism positioned to cut drive shaft, anintermediate shaft geared to the feed-rollers, a sleeve rotatable on theintermediate shaft, a pair of cone pulleys on the drive shaft one of4which is bodily movable toward and from the other, a pair of conepulleys on the sleeve one of which is bodily movable toward and from theother, an endless belt passing over the said cone pulleys, a rotatablecam shaft, means repetitively operable by the cam shaft during rotationthereof for changing the position of at least o e of the bodily movablepulleys to cause the slee'e to rotate alternatively at two differentnormally fixed speeds, a sun gear on the rotatable sleeve,= a planetpinion carrier gear rotatable on the inter mediate shaft, a gear on thedrive shaft meshing with said carrier gear to rotate it at constantspeed, a sun gear secured to the intermediate shaft adjacent saidcarrier gear and having a diameter different from that of the first saidsun gear, pairs of connected planet pinions of different diameterscarried by said carrier gear, the planet gears of each pair meshingrespectively with said sun gears and the ratios ofthe several gears andpinions being such that the intermediate shaft and feed rollers arerotated to effect feeding and coiling when the sleeve is rotated at onesaid speed and are maintained stationary to discontinue feeding andcoiling when the sleeve is rotated at the other said speed, and a meansactuated by the cam shaft for operating the cutoff mechanism when theintermediate shaft and the feed rollers are stationary.

14. The combination in a spring coiling machine as set forth in claim13, wherein there isan adjustable stop for limiting the movement of atleast one of the bodily movable pulleys in one direction so as to rotatethe sleeve at the exact speed that is necessary to maintain theintermediate shaft and feed rollers stationary.

15. `In a spring coiling machine, the combination of. wire feed rollers,spring coiling mechanism positioned to coil the wire after it has' 17sleeve one of which is bodily movable toward and from the other, anendless belt passing over the said cone pulleys, a pivoted leverconnected with one of the said bodily movable pulleys. a rotatable camshaft having a cam which engages the lever and serves to move the leverabout its pivot and to thereby move the said bodily movable pulleyalternately to two different positions so as to cause the sleeve torotate at two different -normally xed speeds, a sun gear on therotatable sleeve, a planet pinion carrier gear rotatable on theintermediate shaft, a gear on the drive shaft meshing with said carriergear'to rotate it at constant speed, a sun gear secured to theintermediate shaft adjacent said carrier gear and having a diameterdifferent from that of the rst said sun gear, pairs of connected planetpinions of different diameters carried by said carrier gear, the planetpinions of each pair meshing respectively with said sun gears and theratios of the several gears and pinions being such that the intermediateshaft and feed rollers are rotated to effect feeding and coiling whenthe sleeve is rotated at one said speed and are maintained stationary todiscontinue feeding and coiling. when the sleeve is rotated at the othersaid speed, and a means actuated by the cam shaft for operating thecutoff mechanism when the intermediate shaft and the feed rollers arestationary.

16. The combination in a spring coiling machine as set forth in claim15, wherein a means is provided for adjusting the pivot of the lever tovary one of the positions to which the bodily movable pulley is moved bythe cam and the lever.

17. The combination in a spring coiling-.machlne, of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has passedthe rollers, cutoff mechanism positioned to cut the wire after it hasbeen coiled, a constant speed drive shaft, an intermediate shaft gearedto the feed rollers, repetitively acting means for rotating theintermediate shaft to ei'- fect feeding and coiling and for stopping theintermediate shaft to discontinue feeding and colling, a rotatable camshaft, a change speed drive mechanism connected with the drive shaft, arotatable member driven by the variable speed mechanism, means operablein timed relationship with the intermediate shaft for adjusting thechange speed mechanism to rotate the rotatable member at one speed whenthe intermediate shaft is rotating and at another speed when theintermediate shaft is stationary, gearing connected with the vrotatablemember and serving upon rotation of the member at the first said speedto rotatethe cam shaft at a relatively low speed and serving uponrotation of the member at the second said speed to rotate the cam shaftat a high speed, and means actuated by the cam shaft while rotating atits high speed for operating the cutoff mechanism.

18. The combination in a spring coiling machine as set'forth in claim17, wherein the cam shaft is rotated at its lower speed when therotatable member is rotated at its lower speed and wherein the cam shaftis rotated at its higher speed when the rotatable member is rotated atits-'higher speed.

19. The combination in a spring coiling machine, of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has`passed the rollers, cutoff mechanism positioned to cut the wire after ithas'been coiled, a constant speed drive shaft, an intermediate shaftgeared to the feed rollers, repetitively acting means for rotating theintermediate shaft to effect feeding and coiling and for stopping theintermediate shaft to discontinue feeding and coiling, a ro. tatable camshaft, a variable speed drive mechanism connected with the drive shaft,a rotatable member driven by the variable speed mechanism, meansoperable in timed relationship with the intermediate shaft for adjustingthe variable speed mechanism to rotate the rotatable member at one speedwhen the intermediate shaft is rotating and at another speed when theintermediate shaft is stationary, gearing connected with the rotatablemember and serving upon rotation of the member at the first said speedto rotate the cam shaft at a relatively low speed and serving uponrotation of the member at the second said speed to rotate the cam shaftat a high speed, manually controlled means for adjusting the variablespeed drive mechanism to change the relatively low speed of the camshaft while the high speed thereof remains unchanged, and

means actuated by the cam shaft while rotating at its high speed foroperating the cutoff mechanism.

20. The combination in a spring coiling machine, of wire feed rollers,spring coiling mechanism positioned to coil the wire after it has passedthe rollers, cutoff mechanism positioned to cut the wire after it hasbeen coiled, a constant speed drive shaft, an intermediate shaft gearedto the feed rollers, repetitively acting means for rotating theintermediate shaft to effect feeding land coiling and for stopping theintermediate shaft to discontinue feeding and coiling, a, rotatable camshaft, a variable speed drive mechanism connected with the drive shaft,a rotatable member driven by the variable speed mechanism, meansrepetitively operable in timed relationship with the intermediate shaftfor adjusting the variable speed mechanism to rotate the rotatablemember at one speed when the intermediate shaft is rotating and atanother speed when the intermediate shaft is stationary, manuallycontrolled means for adjusting the variable speed drive mechanism tochange the first said speed of the rotatable member while the secondsaid speed remains unchanged, gearing connected lwith the rotatablemember and serving upon rotation of the member at the first said speedand in accordance with the manual adjustment of the said speed either torotate the cam shaft at a relatively low speed or to hold it stationary,the said gearing serving upon rotation of the member at the second saidspeed to rotate the cam shaftv at a high speed, and means actuated bythe cam shaft while rotating at its high speed for operating the cutoffmechanism.

2l. The combination in a spring coiling machine as set forth in claim20, wherein there is an adjustable stop for limiting the manualadjustment of the variable speed mechanism so as to rotate the rotatablemember at the exact 'speed that is necessary to hold the cam shaftstationary.

22. A spring coiling machine comprising in combination, wire feedrollers, spring coiling mechanism positioned to coil the wire after ithas passed the rollers, cutoff mechanism positioned to cut the wireafter it has been coiled, a constant speed drive shaft, an intermediateshaft geared to the feed rollers, a rotatable cam shaft, a change speedmechanism connected with the drive shaft, a rotatable member driven bythe change speed mechanism, means operable repetitively by the cam shaftduring rotation thereof for adjusting the change speed mechanism torotate the rotatable member alternatively at two different northeintermediate shaft mally fixed first and second speeds, gearingconnecting the rotatable member with the intermediate shaft and with thecam shaft and serving upon rotation of the member at the first speed torotate the intermediate shaft in the direction to rotate the feedrollers-so as to eifect feeding andv coiling and to rotate the cam shaftat a relatively low speed, the said gearing serving upon rotation passedthe rollers, cutoff mechanism positioned of the member at the secondspeed to maintain tonary so as to discontinue feeding and coiling and torotate the cam shaft at a high a means actuated by the cam shaft whenrotating at high speed for operating the cutoii' mechanism.

23. The combnation in a spring coiling machine as set forth. in claimv22, wherein there are means actuated by the cam shaft when rotating atits relatively low speed for operating the coiling mechanism.

24.- The combination in a spring coiling machine as set forth in claim22, wherein the rst speed'and wherein the second speed thereof is arelatively high speed. Y

25. 4A- spring. coiling machine comprising in combination, wire 4feedrollers, spring coiling and the feed rollers staspeed, and Y speed of,the rotatable member is a relatively low` mechanism positioned' to coilthewire after ithas passed the rollers, cutoif mechanism positioned toout the wire after it has been coiled, a constant e speed drive shaft,an intermediate shaft geared to the feed rollers, a rotatable cam shaft,a variable speed mechanism connected With the drive shaft', a rotatablemember driven by the variable speed mechanism, means operablerepetitively by the cam shaft during rotation thereof for adiust.

ing the variable speed mechanism to rotate the rotatable memberalternatively at two different normally fixed first and second speeds,gearing connecting the rotatable member with the intermediate shaft andwith the cam shaft and serving upon rotation of the ymember at the firstspeed to rotate the intermediate shaft in the direction to to cut thewire after it has been coiled, a constant speed drive shaft, anintermediate shaft geared to the feed rollers, a rotatable cam shaft, achange speed mechanism connected with the drive shaft, a rotatablemember driven by the change speed mechanism, means operable repetitivelyby the cam shaft during rotation thereof for adjusting the change speedmechanism torotate the rotatable member alternatively. at two dierentnormally fixed rst and second speeds, manually controlled means foradjusting the variable speed drive mechanism to change the rst speed yofthe rotatable member while the second speed thereof remains unchanged,gearing connecting the rotatable member with the intermediate shaft andwith the cam shaft and serving upon rotation of the member at the firstspeed to rotate the intermediate shaft in the direction to rotatel thefeed rollers so as to effect feeding and coiling and serving uponrotation-of the member at the first. speed and in accordance with themanual ladjustment of the said speed either to rotate the cam shaft at arelatively low speed or to hold it sationary, the

.said gearing also serving upon rotation of the member atthe secondspeed to maintain theintermediate shaft and the feed rollers stationaryso as to discontinue feeding and coiling and to rotate the cam shaft ata high speed, and a means actuated by the cam shaft when rotating athigh speed for operating the cutoff mechanism.

29.v A 'spring coiling machine comprising in l combination, wire feedrollers, spring coiling mechanism positioned to coil thel wire after ithas passed the rollers, cutoff mechanism positioned to cut the wireafter it has been coiled, a constant speed drive shaft, an intermediateshaft geared to v the feed rollers, 'a rotatable cam shaft, a changespeed mechanism connected with the drive shaft, a rotatable sleeve. onthe intermediate shaft driven by the change speed mechanism, meansoperable rotatethe feed rollers and therebyeffect feeding.

and coiling and to rotate the cam shaft at arela, tively low speed,V thesaid gearing serving upon rotation of the member atthe second speed.to'

maintain the intermediate shaft and -the feed rollers stationary andthereby discontinue feeding and coiling and to rotate the cam shaft at ahigh speed, manually controlled means for adjusting the variable. speeddrivevmechanism to change the iirst speed of the rotatable member whilethe second speed thereof remains unchanged, 'the said means thusservingV to change the speed of wire feed and coinng'and te change therelatively low speed of the cam shaft, and a means actuated by the camshaftwhen lrotating athigh speed for operating the cutoff mechanism.

26. The combination in a spring coiling ma-l chine as set forth in claim25, wherein the gearing.

so' .serves to rotate the intermediate-shaft and the' cam shaft vatspeeds which vary inversely with respect to each other as the firstspeed tatable member is adjusted. a 27. The combination in a .springcoiling' ma-A chine as set forth in claim 25, wherein the'gearing servesto rotate the intermediate shaft at speeds varying inversely withthe'manually adjusted ilrst speed of the rotatable member and whereinthesaid gearing -serves to rotate the cam shafty at speeds varyingdrectly'with the said manually adjusted first speed of the'rotatablem'emberfv 28. A spring coiling machine comprising in combination, wirefeed rollers, spring coiling mechanism positioned to coil the wire afterit has of the rorepetitively bythe cam shaft duringl rotation thereoffor adjusting. the change speed-mechanism to rotate the sleevealternatively at .two different normally'- fixed first and secondspeeds',' gearing connecting the sleeve withthe .inter-l mediate shaftand with the camshaft and-serving upon rotation lof the sleeve at ltherstspeed to speed for. operating the cutoff mechanism,

30. A 'spring vcoiling machine comprisingdn combination, wire feedrollers, springcoiling' mechanism positioned to. coil lthe wire after itAhas passed the rollers,l cutoff mechanism posil tioned to cut the'wireafterit has been coiled,

aA constantA speed 4drive shaft, an lintermediate shaft geared to thefeed rollers,a-, rotatable cam shaft, a rotatable sleeve on theintermediate shaft,

a var iablespeed` mechanism connecting-the drive shaft lwith the sleeveand comprising fa pair of.

cone pulleys on the vdrive, shaftl oneof vwhich is bodily movable towardand from the other vand a pair of cone pulleyson the sleeve'one of whichis bodily movable toward and from the other and alsocomprising anendless belt passing Aover and engaging the pulleys, means operablerepetitively by the cam shaft during rotation thereof for to eilectfeeding and changing the position of at least one of the bodily Imovable pulleys to rotate the sleeve alternatively at two differentnormally fixed first and second speeds, gearing connecting the sleevewith the intermediate shaft and with the cam shaft and serving uponrotation of the sleeve at the first speed to rotate the intermediateshaft in the direction to rotate the feed rollers so as to effectfeeding and coiling and to rotate the cam shaft at a relatively lowspeed, the said gearing serving upon rotation of the sleeve at thesecondspeed to maintain the intermediate shaft and the feed rollersstationary so as to discontinue feeding and coiling and to rotate thecam shaft at a high speed, and a means actuated by the cam shaft whenrotating at high speed for operating the cutoff mechanism.

31. A spring coiling machine comprising in combination, wire feedrollers, spring coiling mechanism positioned to coil the wire after ithas passed the rollers, cutoff mechanism positioned to cut the Wireafter it has been coiled, a constant speed drive shaft, an intermediateshaft geared to the feed rollers. a rotatable cam shaft. a change speedmechanism connected with the drive shaft, a rotatable sleeve on theintermediate shaft driven by the change speed mechanism, means operablerepetitively by the cam shaft during rotation thereof for adjusting thechange speed mechanism to rotate the sleeve alternatively at twodifferent normally fixed first and second speeds, gearing connecting thesleeve with the intermediate shaft and with the cam shaft and includingplanetary gearing on the intermediate shaft and planetary gearing on thecam shaft, the connecting gearing serving upon rotation of the sleeve atthe first speed to rotate the intermediate shaft in the direction torotate the feed rollers so as to effect feeding and coiling and torotate the cam shaft at a relatively low speed and the said connectinggearing serving upon rotation of the sleeve at the second speed tomaintain the intermediate shaft and the feed rollers stationary so as todiscontinue feeding and coiling and to rotate the cam shaft at a highspeed, and a means actuated by the cam shaft when rotating at high speedfor operating the cutoff mechanism.

32. A spring coiling machine comprising in combination, wire feedrollers, spring coiling mechanism positioned to coil the wire after ithas passed the rollers, cutoff mechanism positioned to cut the wireafter it has been coiled, a constant speed drive shaft, an intermediateshaft geared to the feed rollers, a rotatable cam shaft, a change speedmechanism connected with the drive shaft, a rotatable sleeve on theintermediate shaft driven by the change speed mechf anism, meansoperable repetitively bythe cam shaft during rotation thereof foradjusting the change speed mechanism to rotate the sleeve alternativelyat two different normally fixed speeds, a sun gear on the rotatablesleeve, a planet pinion carrier gear rotatable on the intermediateshaft, a gear on the drive shaft meshing with the said carrier gear torotate it at constant speed, a sun gear secured to the intermediateshaft adjacent said carrier gear and having a diameter different fromthat of the first said sungear, pairs of connected planet pinions ofdierent diameters carried by the said carrier gear, the planet pinionsof each pair meshing respectively with said sun gears and the ratios ofthe several gears and pinions being such that the intermediate shaft andfeed rollers are rotated coiling when the sleeve is stationary todiscontinue feeding and coiling when the sleeve is rotated at the othersaid speed, a gear rotatable on the cam shaft, a gear secured to theintermediate shaft and meshing with the said gear on the cam shaft, asun gear rotatable on the cam shaft in unison with. the first said gearthereon, a planet pinion carrier gear rotatable on the cam shaft, a gearon the drive shaft meshing with the last said carrier gear to rotate itat constant speed, a sun gear secured to the cam shaft adjacent the lastsaid carrier gear and having a diameter different from that of the rstsaid sun gear on the cam shaft, pairs of connected planet pinions ofdifferent diameters carried by the last said carrier gear, the planetpinions of each pair meshing respectively with said sun gears on the camshaft and the ratio of the last said several gears and pinions beingsuch that the cam shaft is rotated at a relatively high speed when therotatable sleeve is rotated at its maximum speed and the intermediateshaft is stationary and being such that the cam shaft is rotated at alower speed when the rotatable sleeve is rotated at its lower speed andthe intermediate shaft is rotated, and a means actuated by the cam shaftwhen rotating at high speed for operating the cutoff` mechanism.

33. The combination in a spring coilingm machine as set forth in claim31, wherein the change speed gearing is of the variable speed type andcomprises a pair of cone pulleys on the drive shaft one of which isbodily movable toward and from the other, a pair of cone pulleys on thesleeve one of which is bodily movable toward and from the other and anendless belt passing over the said cone pulleys, and wherein the meansfor adjusting the variable speed mechanism serves to change the positionof at least one of the bodily movable pulleys to cause the sleeve torotate alternately at two dierentspeeds.

34. The combination in a spring coiling machine as set forth in claim31, wherein the change speed gearing is of the Variable speed type andcomprises a pair of cone pulleys on the drive shaft one of whichls'bodily movable toward and from the other, a pair of cone pulleys on.the sleeve'one of which is bodily movable toward and from the other andan endless belt passing over the said cone pulleys, wherein the meansfor adjusting the variable speed mechanism is a cam actuated pivotedlever connected with one of the bodily movable pulleys to change theposition thereof and cause the sleeve to rotate at two different speeds,and wherein means is provided for moving the pivot of the lever tochange one of the normally xed speeds of the sleeve.

35. A wire coiling machine comprising wire feed rollers, coilingmechanism positioned to coil the wire after it has passed the rollers,cut olf mechanism positioned to sever the coiled wire, a drive shaft, adifferential change speed mechanism connecting the shaft with therollers and operable to drive the latter at rates varying with respectto kthat of the drive shaft, a cam shaft driven by the drive shaft, acam mechanism connected with' the cam shaft and operating to control thedifferential mechanism and cause it to drive the rollers at ratesvarying from zero to a maximum, and cam controlled means connected withthe cam shaft and operable to cause the cut oil mechanism to sever thewire when the feed rollers are held stationary by the differentialmechanism under the control of the cam mechanism.

36. A machine according to claim 35 comprisannees ing mechanism forrotating the cam shaft at a rate which decreases as the roller speedrisincreased so as to provide time to feed a long length of wire during a.partial lrotation of the cam `shaft and which cam shaft rate increasestowards a n maximum as the roller feed rate approaches zerointerconnecting the twol differential mechanisms which causes the camshaft to movejat a rate inV 1 an inverse'ratio to the -feed roller rate.

Number 39. A machine according to ciaimfcompris- 1 v ing means `foradjusting the dinerential speed mechanism `while the machine is runningso as to vary the feed roller rate, A

ELMER W. HALVORSEN.

REFERENCES CITED `The following references are of record in the.

le of this patent:

UNITED STATES PATENTS Name Date 2,038,860 Stewart Apr. 28, 19362,096g605 Blount' oct. 19. 1937 p 2,135,729 oigay Nov. 8, 1938 i'2,161,894- Bishop June 13,1939 2,175,426 Blount Oct. 10, 1939 2,260,053Platt Oct. 21, 1941

